My 81 grand prix wit a 3.8 l v6 has been overheating for a long time then when it gets a certain temp and u turn the motor off it will pop..could the water pump be pumpin weak and cause the rad hose to swell then buildin alot of pressure causing the pop?

Replace the radiator cap. Make sure the pressure rating is oem spec. If that don't work, verify that the cooling fan is coming on. If they aren't, start with the coolant temp sensor. If that's good go to the fan relay. If it's good check for power at the fans connection to the harness. If you have power there you may need a new fan motor. Remember that the you'll not see power anywhere unless the engine is hot enough to make the ecu turn them on.

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.

User Name:

Password

Please enter a password for your user account. Note that passwords are case-sensitive.

Password:

Confirm Password:

Email Address

Please enter a valid email address for yourself.

Email Address:

Log-in

User Name

Remember Me?

Password

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.